Palm Pre P100EWW - Manual (Page 163)

Chapter 11 : Troubleshooting 163
4 Press and release the back cover release .
5 Slide your thumbnail or a credit card between the back cover and the
phone, starting at the bottom and moving halfway up one side until
you hear the clasp (x) release.
6 Repeat step 2 to release the clasp (y) on the other side of the phone.
7 Lift off the back cover.
I can’t get the back cover on
1 Position the back cover over the phone and gently press the top two
clasps (a), located at the top corners. Then press the two clasps (b)
halfway down either side of the phone.